We had never used any shrinky type activity sets before so I wasn't quite sure what to expect. I bought this for my 10 year old daughter to take on holiday in case of rainy days. She loved it and spent any spare time she had playing with it. The process is easy:
choose design in book
trace over it using the plastic sheets
cut round the design
pop it in oven (gas or electric but not microwave) for couple of minutes
take out and admire
You can use normal colouring pencils to colour the design and, because it shrinks, the colours come out lovely and deep.
You can use a hole punch to make holes in some of them before they go in the oven and then you can use for phone charms, necklaces etc. We haven't got round to that yet. There's something about seeing the design in miniature which seems to fascinate children and it's especially rewarding because the design always look better when shrunk.
Highly recommended especially for those children who don't yet have the dexterity or patience to master some of the other Klutz stuff eg friendship bracelets or paper fashions.