I recently gave my friends little girl a toy washing machine - she loved it.
Have also given 3 year olds girls;
Funky boots/handbag set,makeup kits,easel for drawing,tea sets,dolls,prams, toy ovens, wheel barrows, books, dress ups
3 yr boys;
cars, trucks, dirt, ovens, brooms, wheelbarrows, bug collectors, books, sprinklers, board games (simple).
A lot of kids at three like to "play house" and mimic what mum and dad or other adults do, also be superheroes or characters.
Hope this helps.
Sal, two mischief boys 4yrs & 16 mth's