We have a jar of marbles that belonged to my dad when he was a kid and on very special occasions, we will pull them out and let Ryder roll them around on the carpet.
(It's a big commitment because we NEVER leave him with them, since they can be a choking hazard and the cleanup is very tedious, but it really can be a fun treat for Ryder...)
We hope that you have a great day!
ps: if you come over for a playmate, don't worry, we won't play with marbles... we will stick with things like our knife collection and balloons, you know, the safe stuff...)