CartonUp will be the best sealer for your cereal bag, since the standard large spout is the easiest for pouring anything. It can also be attached to the paper box and create a carton.
Once set up, it will be easy enough for a three-year old to handle - No more wasted cereal on your breakfast table.
It's very easy to seal the bag:
and to create a carton:
It works for all types of cereal:
There are three basic colors:
Standard large mouth - don't worry about losing the cap:
Stretch Goal - Three More Colors available if we can reach CAD 45K:
Rewards of either Sealers or CartonUp sets: