Simplify the following text for a Grade 11 native English-speaking person.
Original: Make Way for Ducklings won the 1942 Caldecott Medal for McCloskey 's illustrations , executed in charcoal then lithographed on zinc plates .
Simplified: Make Way for Ducklings won the 1942 Caldecott Medal for McCloskey 's pictures , drawn in charcoal , then lithographed on zinc .