Learning Resources Uppercase Alphabet Stamps. Put your stamp on early literacy skills with these uppercase alphabet stamps! Kids will love practicing the alphabet, spelling simple words and developing their grammar skills with these easy-to-use plastic stamps. Children can also practice writing by tracing the stamped letter. Set of 34 includes 1 complete alphabet and 8 punctuation stamps. Stamps feature easy-to-hold recesses. Letter stamps measure 2.5cm x 2.5cm, punctuation stamps measure 1cm x 2.5cm. Includes handy storage tray. Suitable for ages 3+. Ink pad available separately.