Let tenant install a swing set?

[Yohannes Kifle]

We have a new tenant with three young kids who would like to setup a swing set in the backyard. We would like to make them happy and let them install it but we wanted to check with the BP community if there are things we need to think off. This property is in Illinois.

If it's their swing set are we liable if anyone gets injured on it?

Should we ask our other tenants if they will be ok with a swing set in the backyard. It is a very large yard that just had a small shed on it.

Thanks for the help!