First Birthday Fun. Have a super celebration with the Pink 1st Birthday High Chair Kit. This birthday high chair set is the perfect decoration for smash cake photos! Three piece birthday set includes: mini pennant banner plastic bib and a plastic floor mat. Mini pennant banner is approximately 31 in length. Easy cleanup mat is approximately 48 x 30. Made of plastic. Whether it is a small party or a large celebration make sure your little girls first birthday party is one you will always remember. Stock up on first birthday decorations and tableware for your child s big day.