outsunny 11pcs balance stepping stones for kids fish style non slip obstacle course larger size stackable balance blocks indoor outdoorLooking for a safe and fun activity opportunity for your child? The outdoor stepping stones are built with high density plastic that ensures safety during the fun. There are also elements of the design to maintain kids' interest, from a variety of implemented colors and modular options. With the ways that the kids balance stepping stones is stackable, you'll be able to store them very easily. Increase the options for their play by buying multiple sets.