Is is possible for customers to enter their own price for a gift voucher

I have just installed the gift voucher mod and have tested it and is working fine.

I was going to add several different vouchers of different amounts, eg $20, $40 etc

Instead of doing this, is it possible for the customer to enter their own amount they wish to purchase?

Anna
toycrazy.com.au

You can set the product to $1.00 then let them order the number they want