Using non toxic paint cover the childs foot in Orange paint.
Have a piece of white card folded in half and ask the child to slowly push their foot onto the card, be careful they don’t smudge!
Mix some brown paint and let them dot round the mane with a thick paint brush.
Dip a piece of card into some green paint and let them make the grass stripes around the base of the lion.
If they are old enough the can paint the tail and face too.