Bought these to go in my son's birthday party gift bags. They felt pretty cheaply made to me but were well liked by his friends.These come in cool designs. My daughters love them, not the most durable, you get what you pay for.Tension on them felt a little tight so they weren’t as loose and able to move around as quickly when I was fidgeting with them with one handed. But if you want to keep both hands busy they’re perfect.I knew nothing about them but granddaughter requested them as a possible gift. They are like small rubic cubes from years ago but easier. I don't really care, she loved themThese are very fun blocks for me and my kids but they are cheaply made and will not take much abuse.It’s entertaining!!Bought these for party favors. Most of them were broken within 5 minutes. Don't waste your time.I teach special education and bought these cubes for my students. Only 2 of the 8 worked like they should. The other 6 were very cheaply made and fell apart to easy. My student would not be able to use them.