It's an ordinary day when some fluffy thing falls from the sky. One counts it, then it quickly attaches to her and starts tickling her. Two soon notices it, wanting one of his own. Soon, more fluffies come from the sky, as Two counts a pair of them and also gets tickled. More fall from the sky, and One and Two soon realize they have to prevent the others from counting them and getting tickled.
Unfortunately, they're too late for the others, as they all count the fluffies and get tickled. Seven comes in soon enough, and counts seven of them too. However, they simply attach to him and he doesn't react. Seven then reveals that sevens are not ticklish. After realizing his friends' plight, he tells them to add up to Seven. One and Six, Two and Five, and Three and Four each add up to Seven.
After having done that, they realize they still have to get the fluffies off of them. Eight comes in, giving the fluffies a taste of their own medicine, and also scaring them away.
The three Sevens that the Numberblocks One through Six made are the colours of those characters but become rainbow later. This may be similar to later episodes in which Numberblocks that are 'Tens-and-a-bit' maintain the colours of their place value components (e.g. Eleven being coloured like Ten and One.)
The song that one sings at the beginning is the song from the episode "One", the first episode of the series.
The music when the fluffies first start tickling appears in Meet the Numberblocks, and the addition sequence in Hide and Seek.
Turns out sevens are not ticklish, which makes it all the more interesting and ironic that Seven, the one character who has never felt a tickling sensation was the one to bring up tickling in Eight’s debut.
Errors[]
When Six counts the fluffies, Five's glove is missing, but when One and Six add up to make Seven, Five's glove returns.
Eight's eyes enlarge upon saying "Huh! Ha! Ready for more?"
