Waterproof Blanket for Bed, Couch & Pets, Leakproof Reversible Fleece Throw for Intimacy, Spills, Dogs, Cats & Accidents, Machine Washable Furniture Protector, Queen Size 65 x 80, Gray

We have this one.

Since you play a lot on your bed, have you thought about getting a waterproof sheet. They easily wipe clean or can be run through the washer/dryer. Sheets of San Francisco's products are absolutely amazing and comfortable - they are rather expensive though. 😞 The other choice is putting a waterproof blanket over your sheets while you play, like this one. They definitely do make waterproof mattress protectors as well but in that case you will still need to strip off your sheets if they get messy.