I bought this product for children, and they loved playing and creating with the gears.I’m a teacher and my kids love these!ONE OF THE ABSOLUTE BEST GIFTS I EVER PURCHASED FOR MY SON WHO’S ON THE SPECTRUM. He was 4 years old when he first opened & played with these, and his ability to immediately build right out of the bucket genuinely amazed me. His little advanced brain figured it out, to the point he knew it would lock if he didn’t remove a gear prior to turning the crank (good enough, he removed it & cranked his invention for the first time, & every single gear turned as expected). He used all but one gear the first time he built with it, and continued to enjoy building other creations for the following several years.He is 12 now, so it was 8 years ago I made this purchase. I eventually purchased the other Gears Sets available, and he especially enjoyed the set with multiple-sized gears. He definitely had basic gear ratio understanding by the time he was 5 yrs old thanks to his ability to mix the sets.I ABSOLUTELY LOVE THESE PRODUCTS AND AM GRATEFUL MY SON WAS ABLE TO ENJOY THEM AT SUCH A YOUNG AGE. I sometimes wonder how much worse his autism could’ve ended up being if he wasn’t able to access the types of toys that advanced his thought processes the way these have. And I’m forever grateful I didn’t have to find out.I purchased these with my personal money for my classroom. My class loves these. I just wish there were two more levers so that more kids could use it at a time. Otherwise, I highly recommend.I bought the Gears Gears Gears set for my 3 1/2 year old grand daughter for this Christmas because she loves building with things. I love the bright colors and that they will snap together making this a toy she can use her imagination with. I read a lot of reviews before purchasing this set and I think she is going to love this. This is something that will get easier and easier for her to do as she gets a bit bigger and we can add different sets to it as we go along. I like the larger set because we will be able to build a lot of different things.I have a 7 and 3 year old. They had so much fun with these. I had fun as well..This is a great set for a little constructor. My 3.5 years old son loves constructing complex stuff with toys therefore to encourage him we have purchased many sets for him (legos, mega blocks, thistle blocks, quercetti tubes) Each offer different fun but this one stands out being the most mobile one.It comes with 95 hard plastic pieces, some are to construct the base plate while another group is to carry the fun to the third dimension (the upright sticks) The rest of the pieces are colorful interdenting gears. Finally it has two handle bits which you need to move the gears round and round.You can put the gears and sticks in various combinations (gears on the side of sticks or sticks on top of gears or gears on top of each other etc.)After some trial and error experience with me (my son and I) we figured out the way they should be aligned to transfer a horizontal rotation to a vertical one. Then my son took over and started building interesting combinations. I am sure he will master it in time.My experience is that the parts are a little stiff which is good for non wobbling steady rotation but bad for the little one to stick them together. So younger children may need some help from the parents.The price ($30) is good considering the number of pieces. Each piece comes to around 30 cents which is lower than many other construction toys. (better than quercetti and lego duplos but slightliy worse than mega blocks.) Besides the storage can is a real good advantage to store it properly after play time.This toy set offers good fun for the little one and helps develop his/her fine motor skills as well as supporting the imagination. Yet it might be difficult to operate or master for younger children. I recommend it to anyone who is after a good toy set at a decent price...Nothing to construct. Ready to enjoy.My daughter absolutely loves the toy. The reason for fewer stars is the price. The bucket is a very good addition to store the pieces but I feel that that has added up more to the price. Instead of the bucket, they could have given more base pieces to build upon.I think this is brilliant and my 4 year old construction mad son loves it. Two gripes however it has not been possible yet to build a gear system that could go up and over as the gears become jammed.Other one is why are all the gears the same size? Wouldn't it be great to see the way cogs can be geared. Even just having 3 sizes of cog and some extra pins on the baseplates could allow for this.My 6 year old grandson loves these. He is very pleased with himself when he turns the handle and they all rotate, horizontally and vertically. My 18 month and 2 year old granddaughters are just as impressed, counting and sorting the colours. The base plates are difficult to fit together, an adult is needed here, but after that you can just let them go !!Great sturdy product that I know my son loves playing with at nursery. There are a couple of example images/constructions that you can build on the side of the wonderful storage tub, however, i do feel that a few more examples of what can be built for both adults and children to follow would be beneficialLovely gears