Good Riddles

Question: You can feel me but you can't touch me You can give me but you can't take me What am I ?

Question: I get dirty in about 5 days but it takes half an hour to clean me. It takes a long time for me to be tall but I can be short in about 2 seconds what am I ?

Question: what is small but can save things that do not weight anything in it?

Question: what can walk on 4 when they are born, walk on 2 legs when they are older and walk on 3 when they are old uncles and aunties?

Question: what house can fly?