Firefly
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Theme
learning concepts
Books about learning concepts for readers of all ages.
Sizes (Toddler Time)
Ages 3–8
size comparison
shapes
Big and small
PBS for Kids
Ages 1–4
size and scale
dinosaurs
All Sorts of Things
Ages 3–6
categorization
diversity
Circles (Welcome Books: City Shapes)
Jan Kottke
Ages 2–5
shapes
geometry