3D Pop Up Happy Birthday Gift Greeting Cards for Kids. Set of 4-Assortment Pack Set of 4 assorted cards included with envelopes. Sizes from 4.7 x 4.7 inch to 4 x 6 inch (not expanded) Delight your favourite niece or nephew, child, new parents or friend with these gift cards. Watch their face light up when you surprise them with this card for their birthday. Beautiful 3D pop up Happy Birthday cards. Suitable for all aged kids- both boys and girls. Each 3d pop up card is made from quality paper. CLICK on "FunPop" above for more amazing cards