It's a snowy day, and Alphablock S is enjoying a ride on a SLED, when she hits a bump and her letter pops out of her dome. Now, S can't make her ‘s' sound any more. Her mischievous letter doesn't want to be caught and enjoys making her friends SLIP and SKID in the snow. Alphablock O has an idea. T challenges the letter S to a race up the hill. The other letters arrive at the TOP first, and then jump out to grab the ‘s' to make STOP. Now, they can put it back in the right SPOT in S's dome.

Alphablocks A and M take a parcel to Alphablocks T, P and S - the Trusty Postal Service. They try to make a postage STAMP for it. A large boot stamps the parcel flat! Alphablock S has to reinflate it. They try the STAMP again - success! Next, Alphablock I wants T, P and S to deliver an elephant to its home. But how? It is very heavy. They try to make it SPRINT, but it runs amok. It won't SPRING home, either. They make Alphablock P STRONG so that she can carry the elephant all the way home on her own.