This is the treat ball we use (typically we fill it up with a handful of cheerios): https://www.amazon.com/Omega-Paw-Tricky-Treat-Ball/dp/B078VT6WZJ/ref=sr_1_3_mod_primary_new?keywords=orange+treat+ball+for+dogs&qid=1641346435&sbo=RZvfv%2F%2FHxDF%2BO5021pAnSA%3D%3D&sprefix=orange+treat+ball%2Caps%2C136&sr=8-3

Also she knows different toy names as well and we keep her toys in a basket so she has to look through to pick out the "right" one we are asking for.

Never tried to play hide and seek - so will certainly give that a shot!