It flies for the first time in the new series, episode 28 (Flying).
Narrator: One day, in Teletubbyland, Po was riding the scooter very fast. ... Tinky Winky, Dipsy and Laa-Laa thought that Po was going very fast. ... Po went faster and faster. ... Look at that! Po flew up into the sky.
This article on the BBC website talks about the changes that have been made to the show, bringing it up-to-date for a new generation of hyperkinetic mobile-phone and tablet-obsessed children with even lower attention spans.
Staying true to the original series Tinky Winky, Dipsy, Laa-Laa and Po
retain their loveable, huggable distinctive features but have been
subtly updated to cater for today’s pre-schoolers. The Teletubbies now
have 21st century Touch Screen Tummies, which will broadcast beautiful
live action films, shot from a child’s perspective. Some familiar
characters will be back, including the Teletubbies’ hoover-like
companion Noo-noo, and the series will feature many exciting new
elements too: The Teletubbies’ new gadget, the Tubby Phone (voiced by
Jane Horrocks), will bring the Teletubbies bang up to date with
technology, and a twirling, whirling Tubby Custard Ride will provide
the characters with endless custardy chaos and fun.
Using pioneering technology, Teletubbyland and Home Hill have been
visually enriched to create a magical environment for pre-schoolers to
let their imaginations run wild. Intricate details such as stunning
flowers, that viewers will see grow from buds into fully fledged
blooms, will add bursts of glorious colour, and a new windmill,
crafted from natural materials, is also part of the lush environment.