1 might work but I’ve never watched much preschool TV (not even Sesame Street).
 
2 is a joke answer, 4 and 5 wouldn’t work without going into teen or higher rating territory.

1
 
but 4 image is halo not full alien game

4, on the condition that the name is changed to Space Horse.

Equestria supergirls sounds like equestria girls season 3.

Probably 1 or 3

The obvious answer to me seems to be the socks one.