GONGE River Stones - Set of 6

These have already survived two years of daily living-room use and still look brand new. The grippy texture on the bottom keeps them steady on hardwood, and my kids love that they can stack them to make a wobbly tower.

My toddler went from hesitant stepping to full-on leaping between these in about a week, and the way they wobble just enough really forces her to focus on each landing. The set of six gives plenty of room to set up a fun course in our living room, and she keeps asking to play with them every day.

Nice thick rubber texture so little feet don't slip, and the stones stay put on carpet. Only wish they were a bit taller to make it more of a challenge for my 4-year-old.