I think a toy gun is a totally (suit) toy for a four-year old.
unsuitable
reading, writing, arithmetics
Three R's
very easy
piece of cake
sheepish
shy
Colin acted with (admire) restraint, despite how angry he must have been feeling.
admirable
a person who is learning a trade or art by experience under a skilled worker
apprentice
Don't take something seriously.
Take with a grain of salt
tedious
boring
After a difficult ________, Michael went on to be a successful lawyer.
upbringing
the instructional program that prepares you for an occupation that requires a specialised skill, such as a technician, artisan or tradesperson
vocational training
casual conversation
chew the fat
industrious
hard-working
I am looking for a (repute )jeweller who will be able to appraise this watch and tell me how much it's worth.
reputable
forcing someone, or being forced, to leave a school, organization, or country
expulsion
don't regret what cannot be undone
no use crying over spilt milk
meticulous
careful, accurate
The shark's is somewhat unfair as fatal attacks are extremely rare.
notoriety
correspondence course
to risk losing
everything by putting all one's efforts or money
into one plan
put all eggs in one basket
treacherous
dishonest