fabric sealant for T shirt

[ClosedAuraOpenMind]

DD has just come home from holiday club, and they were designing/decorating T shirts today.
but of course they didn't use permanent pens 🤦‍♀️ is there anything I can spray on this T shirt to stop the design from just disappearing in the wash??
thanks

You can go over it with a fabric pen or permanent marker and then iron it. Otherwise, you will almost certainly lose the design, I'm afraid.

thanks....we've got some fabric pens so will get DD to do that. will keep her occupied for a while as well