Discs for the planetarium

A child asks to buy some disks for the home planetarium. But I have no idea what it is at all. Maybe you can tell me what it is and where to buy these disks?

I think it makes sense to ask your child about these CDs. You'll definitely get the advice you need there. But if that's not an option for you, then try looking here https://astronomix.info/planetarium-discs.html As far as I'm concerned, you can buy a disc there that you like. But I would recommend that you look at discs for homestar