I believe if you purchases all of that and put it into a 45 minute show, you would try to rush through the show, wanting to complete every effect. And the show, overall, would end up horrible. However, that being said, certain things can be grouped together, such as:
-Magic Coloring Book
For example, you bring out your magical coloring book, which is blank, wave over it with your wand, and now there are pictures. You bring out a box of crayons, set it on your table, or stool, or whatever you're using, and ask your assistant to color the book for you with your magic wand. You hand her the book and tell her to wave over it with the wand. The wand breaks apart. So then you take it back, fix it, and try it again. This time she waves the broken wand over the coloring book, and when looked at, all the crayons are gone. Of course, when you go through the coloring book, every page is colored.
To me, that would be a very entertaining piece of magic, especially with good acting skills on behalf of the magician. It could be played out for at least 10 minutes, and with a little switcheroo in your case, you could give the spectator the crayons, the coloring book, and the wand (obviously replaced for a normal wand), as souvenirs. I think that would go over great with the parents, especially if your assistant that gets the gifts is the birthday child.
So, before you go and buy all that stuff, really think it through, and think about what you can group together, what would be dumb in a children's show, etc. You'll find that you can greatly narrow down your show both time wise and in the amount of effects you have in it. Good luck.