Here is the full list of all 15 Family Hidden Secret - there are Hidden Objects Puzzle Adventure achievements.
Reached Level 3
Reached Level 6
Reached Level 9
The first collection is collected
5 collections are collected
4 locations reached level 2
8 locations reached level 2
4 locations reached level 3
8 locations reached level 3
5 boosters used
25 boosters used
50 boosters used
1000 coins spent
2500 coins spent
5000 coins spent