Mickey Mouse Birthday Cards

Ok so basically, instead of toys and gifts for his birthday this year I want to ask everyone attending to bring dollars or Disney Disney gift cards or money because we are taking him for his b day-and he could just have a big toy or is able to enjoy a character breakfast or lunch or dinner. How do I put this in simple terms and politely? Help please! People who come are my friends, my family and some of my friends moms! We may also use some cards Visa, MasterCard or American Express gift cards for clothes of his trip as well!
Also, as far as food goes should I just do pizza, bread sticks, pasta salad and beverages? I thought from Little Caesars.
He has several toys as it is. they just sit in the garage and never played with and it is really Mickey Mouse!
Ok I have to do for his birthday! It will be mostly adults ...

**** My mother did the idea of ae‹ae‹a gift registry card! Making one of my own and put my son is registered to Disneyland! I worked on it last night and these are saying I came up with below, which of these it is said in the most polite ...

If you would like him a gift, he would enjoy DOLLAR DISNEY Disney or gift cards for her birthday trip to Disneyland! He has many toys that are!

or

KOEN is recorded for DISNEY DISNEY DOLLARS AND GIFT CARDS!
He takes a trip to Disneyland for her birthday!
He has many toys that are!

I'm sorry but I do not think you can tell people what to do with your son for his birthday at the invitation like that. I have a theme birthday DW and tell people that you do this because your son likes Mickey Mouse and your present to him a trip to Disney World (great gift in progress). If people ask, then you can tell them that he has a lot of toys, but need something for the trip including cash, gift cards, clothing, etc. Most people want to give at least a small gift ( I love to do a book with a gift card as a book mark). Just my thoughts - have a great time at Disney World.

It sounds good. I do something similar for the seventh anniversary of my daughter. We have four girls in different ages so that we literally have every toy under the sun! :)
I put my invitations:

If you wish to owuld (name of child) birthday trip to Disney more special, he'd like a (insert gift, whatever here)

You can always ask them when things get prepaid credit card.