Stapelsteins were BIG in my parenting groups, so I had to go seek out buying them from the German site last year to gift my toddler. I'm so glad they are now readily available in the US. The material is so strong (can support my weight as an adult), yet light - you're almost asking yourself why you bought styrofoam. But it's not - it's more than that. It's open play for your kid to be creative - it can be a bowl, a hat, a rock to jump on, etc. Fun and colorful to stack on (so small footprint too). I highly recommend them!
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