Z's Magic Birthday Invitations

It's party time again here with Z's 5th on the horizon. He was actually born in August but I've delayed the party until everyone is back from their holidays. This year the invite has a pull-out tab that turns the number 5 from black and white to colour. I love the way they've turned out, which is good as they were a lot more difficult to make than I thought they would be. J is a graphic designer and he pretty much took over when I got stuck. I got a little frustrated with the precision engineering required to make the pull-out mechanism work properly and lining up the colour with the outline. Now they are finished I'm glad we stuck with it because they are fun and Z absolutely loves them. He will be handing them out today in the envelopes he helped make with simple brown paper and patterned tape.