Decorating now-adding picture later

Hey, I need some help!! I am making a scrapbook of my 3 kids from birth to now for a very close friend of mine. I had the kids each take a white piece of paper and use fingerpaint to put their hands on the page. Then we went to the store and they got a bunch of stickers to decorate each of their own pages. I have no pictures of my friend with the girls so I wanted to decorate the page now and have her add a picture later but i have no idea how to do this. I dont want her to have to buy tape or glue and glue it on the page. I was going to get photo corners so she could just stick the picture in the corners and that was it but the corners said you had to stick them to the picture then the page. Any ideas on how I can go about doing this without her having to do any work??

You could use removable adhesive dots to tack a little row of photo corners to where she would put in her photo with handwritten instructions on how to apply (using the same dots to adhere the instructions).

You can still buy photo corners that don't have to be stuck to the item - the kind where the corners of the item tuck into the photo corner. What you found are probably called photo splits or photo mounting squares, but you can still buy the photo corners you're probably thinking of.

It is much easier to put the corners on the photo then stick it down. Assume she will use a four by six photo, cut a piece of 4 by 6 piece of white card stock, slip the photo corners unto it and stick it down in place. Write insert 4 by 6 photo here. She will be able to slip the white card stock out of the photo corners and then insert the photo into the photo corners all ready in place.

Other option is give here a roll of double stick tape to use to put the pictures down when she gets them.

mounting squares are perfect for this!