beach

bottle

building

bulldozer

childhood

children

city

class

color

concept

cute

dig

europe

excavation

excavator

flask

hand

heavy

holding

institute

knowledge

kopernik

landmark

learning

leisure

liquid

little

loader

male

medicine

museum

play

playing

preschool

road

schoolboy

scientific

small

smart

smile

studying

surprised

toy

transportation

travel

visitors

yellow