flea

Both Kids:
The Hobbit
Swallows and Amazons (no sequels yet, but I plan to read some)
The Penderwicks (and sequel 1 so far)
Danny the Champion of the World (lesser-known Dahl, my favorite)
Alvin Ho (we've done 1 and 2; Dillo especially loves these)
Farmer Boy (no other Ingalls Wilders yet)
Kenny and the Dragon (Tony DiTerlizzi)
The Rescuers
All-of-a-Kind Family
They've both read the Captain Underpants books with mr. flea (not my cup of tea, but GREAT for a 4 year old with a shorter attention span).

Just Casper (so far):
The Secret Garden (get the version illustrated by Inga Moore)
The Wind in the Willows (also available illustrated by Inga Moore)
Sarah Plain and Tall
Mr. Popper's Penguins
The Twenty-One Balloons
Homer Price (Robert McCloskey chapter book)
She read The Spiderwick Chronicles and is working through Harry Potter with mr. flea; they like both series but I don't love 'em.

There are so many more things I want to read.