Birthday party for 6 year old

Grace

Our house is not very big and I was thinking of renting out a rec centers basketball court to have his birthday party. There are basketballs in there but that’s it. Would that be fun for the kids or should I bring other stuff to play with? I thought about renting a bouncy castle but that is kind of pricey.

Can’t really do a party outside because it is too cold.

Thanks!