É possível que este seja o show Leia tudo sobre isso, produzido no Canadá para a televisão pública americana. Ele apresenta três crianças que entram em uma casa de tijolos fora de uso, que de fato contém um dispositivo de teletransporte transdimensional, construído pelo tio de um dos protagonistas, que era o dono da casa.
De acordo com a Wikipedia:
The show is set in the fictitious town of Herbertville, where 11-year-old Chris Anderson inherits his Uncle Derek's coach house seven years after Derek's mysterious disappearance; Derek is now legally presumed dead. The coach house contains two artificially intelligent robots built by Derek: Otto, a device which communicates by printing its thoughts on paper; and Theta, a talking computer with an integrated monitor. The terms of Derek's will stipulate that Chris can only use the coach house before he's 21 if it's for a worthwhile purpose, so he and his friends Lynne and Samantha start a newspaper called The Herbertville Chronicle.
...
In episode two, the kids discover the coach house also houses a transporter which allows teleportation to and from the galaxy of Trialviron. After inadvertently triggering the transporter, Lynne and Samantha are trapped within Trialviron by Duneedon, the despotic ruler of the galaxy, but manage to escape. This launches a season-long serial, in which the newspaper is focused on unraveling a conspiracy headed by Herbertville mayor Don Eden (the alter ego of Duneedon) who wants to claim King's Park as his own to get a rare mineral he needs to invade Earth.
O piloto (e vários outros episódios) estão disponíveis no YouTube.