As kids we used to make carts with ball bearings, here are some examples: https://www.google.com/search?q=лагерна+количка https://www.google.com/search?q=лагер

As kids we used to make carts with ball bearings, here are some examples: https://www.google.com/search?q=лагерна+количка https://www.google.com/search?q=лагерна+количка I'm not sure whether kids in other countries did them, but being in possession of 4 ball bearings was essential (they were not sold at the stores, or what did I know - I was just a kid, most of them we had to ... ahem steal them).