This has kept my kids (4 and 7) entertained for hours. Would be better if there were 2 independent trays rather than both fixed together, also the "baby" one has not been used at all so a bit of a waste. Luckily we have a 2nd tray from a smaller kit. This is great fun for children who like to make things. I would say it is better than hamma beads in that they can complete the design without an adult's help and obviously faffing with a water spray is always going to be popular!
Wouldn't have bought if the beads weren't biodegradable so very glad they are.