Answer:
We can work at the park, the public library, or the café.
Part two should be the second sentence, but I'm not sure, so read my explanation on that.
Step-by-step explanation:
Now I will show the original sentence, vs how it would need to be written to be correctly punctuated.
#2 (original):
I gave my sister: a coloring book she will enjoy and a gift card to a movie theater.
#2 (fixed):
I gave my sister a coloring book she will enjoy and a gift card to a movie theater.
#3 (original):
My favorite vacations are: hiking in the mountains; and cruises.
#3 (fixed):
My favorite vacations are hiking in the mountains and (going on) cruises.
#4 (original):
I made many items for the craft sale: holiday wreaths; sparkly ornaments; and candleholders.
#4 (fixed):
I made many items for the craft sale: holiday wreaths, sparkly ornaments, and candleholders.
I'm not sure about part two as most of the sentences have issues, but I'd guess it would have to be the second one, as none of the others make too much sense.
You could break the second sentence into two parts, "I gave my sister a coloring book", and "She will enjoy a gift card to a movie theater".
Not too great of an answer, but our other options are worse.
EX:
(sentence 1) "We can work at the park" "The public library, or the café"
(sentence 3) "My favorite vacations are hiking" "In the mountains and cruises"
(sentence 4) "I made many items for the craft sale" "holidy wreaths, sparkly ornaments, and candleholders"
See why I chose the second sentence for part 2?
Hope that helps somewhat! :D