Escape from the Fair

 

One of these seven quid supermarket-at-Christmas affairs, the box itself is fairly big which hides not a lot of content -- four "rooms" to work through with just one puzzle each.  Each puzzle leads to a single digit number to put into the decoder which gives the final door to open to see if you escape.

First puzzle is a logic one, cross off or keep various symbols and spell a number:

Second puzzle is the best of the bunch, a pseudo-jigsaw of balloons which ultimately gives a number as seen here:

Third one I've seen before in this sort of thing, turn the cogs and what number ends up where.

Last one is a common letter substitution one which they must've dreamed up in their sleep, it's so old hat.

Very easy, very quick, not really much cop to be honest.