Start with a heck of a lot of blueberries.
No, the title doesn't refer to a disappearing trick! Though it was a race between me and my sons to see how many I could get into the freezer versus how many they could eat before I did. To give you an idea of what I was up against, I found these in the back of the truck before we even got home from buying the berries.
This is a freezing trick, so you can beat your kids to the punch. Many sources tell you that, when freezing blueberries, you have to wash them, then put them on a cookie tray and flash freeze them before putting them into freezer bags for long term storage, to keep them from freezing in a giant clump. Not true!
All you have to do is wash them, spread them out on a towel like so, and let them dry out thoroughly before putting them into the bags. They can freeze right in the bags and they won't stick together, as long as they aren't wet when you bag them. Saves a lot of time and effort—take it from someone who just put nine flats of blueberries in the freezer.
Which is still quite a bit of time and effort, even with a little (but getting bigger all the time) help.