A new toy my kids have been enjoying and the neighbor kids have been itching to try. A Labyrinth Balance Board. It is a wood disc with a maze or labyrinth and it has wooden balls that you can nagivate through the maze by shifting your weight using your feet which are perched on each side of the disc.
I like that it is wood and therefore sustainable but I really like that it gets kids up and moving and working on their balance, agility, and problem solving.