David is also the husband of Dora (Dora Stein). He is a very smart scientist and he is always building new inventions. He is always seen building (or creating) something in each episode he appears in...
David has a very smart and kind personality. He is usually seen telling the boys (Tim and Oscar) things that are very important. Like, chemicals, dust, clouds, etc.
David has dark brown hair (darker than Oscar's) and he has black eyes. He wears a white shirt, a red tie, wich is mostly hidden by his light brown lab coat. He wears a dark brown belt, dark grey-ish pants, and black/brown shoes.
He is married to Dora. Obviously... he has a wife and a son. He seems to love them both very much.
- Abilitys/Super Powers:
He has no super powers, what so ever. However, he does have a great ability to build things.
- David's outfit was slightly diffrent in season 2.
- Tim seems to call David by the name of "Professor Stein". He does not call him "Oscar's Dad" or "Mr. Stein".