click in the gap between the fridge and the cupboard, at the bottom

Under a lettuce flap and under the off button on the fan (turn on light and press on and off a lot).

1 stuck in the tap.

the key is located by the side of the fridge underneath the doughnut. click on the mice to eat at it then click near the crumbs.

the last one is in the fridge in the yellow egg carton

Here's the ones I've found so far:

1. Under pumpkin lid on first screen
2. Between I and G in the word Light on the microwave
3. Under white spoon (click to move up)
4. On bottle with brown liquid (near label) in cabinet
5. Above right cabinet door when opened
6. (Having gone left) On second button from left, just before red one on stove thing
7. In faucet, click a few times until water runs
8. In same view, little black lines at the bottom right corner of silver stove thing, very tiny
9. In cupboard under sink: left side, pull up lower right part of pipe bulge
10. Right side, black rounded top of red pot
11. Back to normal zoomed out view: bottom left of stove thing, on the wall
12. Click buttons to open stove, just under top silver lid
13. Same view, on bottom lid, right above the drain
14. In top cupboards: on brown box, in the center
15. Right side cabinet door, just under the door
16. (Having gone left again) Bottom left of apron after clicking (it will swing up)
17. Next to lion in picture
18. Brown blob in flowers in same view
19. Zoomed in on waste drawers: Left side of wall, slightly invisible, near top
20. When first drawer is open: bottom left
21. On third symbol
22. In third drawer amongst papers
23. (Having gone left again) On middle plate
24. On second down button in right column on microwave
25. When microwave door is open: under black door
26. In bottom right cabinet: under first pink doll
27. In bottom drawer
28. In top fridge: In far right plastic container
29. In egg container: under first egg in right column
30. In first bottom drawer: bottom left side
31. In between last two icecreams
32. In second bottom drawer: Under lettuce (pull bottom part back)
33. Behind last fruit
34. Click between fridge and cabinets back in zoomed out view: In white pool
35. Click into black gap again: Behind big mouse
36. In donut, behind big mouse after it's eaten
A) Take key from crumbs by the little mice
37. Go left again, click on red door: On brown piece across left side of screen, near the top
38. Back in first screen (with the pumpkin pan and black fan): open bottom cabinet (left side): Just under countertop

So we're only missing two now.
Hope this helps someone :D