- Boy vs. Girl (obvious)
- Jelly is highly verbal. Moe, not so much.
- Jelly loves to sing. She knows the words to many songs, but unfortunately can't carry a tune. Moe also loves to sing, and has great pitch. You are more likely to recognize what Moe is singing by the melody, even though he doesn't sing the words.
Stacks 3 or more blocks:
Understands the concept of "more than one:"
Plays the harmonica with conviction:
Knows how to accessorize:
Okay, those last two may not be milestones per se, but we're making our own rules around here.