My mother is trying to get a toy painted for her grandson (My nephew). She has used Krylon Kid High Gloss, painted it Monday, and the paint is still tacky.

Right now the toy is sitting on the kitchen table, which is a relatively dry room, and has been there since Monday. Is there anything she can do to help this thing dry out? Maybe a heat lamp or such?

Try placing the toy in the path of a fan.

If the paint had the more modern, lower photoreactive solvents and set around too long, it may never dry. I think your idea of heat is more likely to help than a fan. Perhaps outside in the sun under a tarp or box?