Are we there yet? Are we there yet? Are we there yet? Are we there yet? Are we there yet? Are we there yet?

Road trips with small children are never fun. But spare a thought for the children who are bored out of their minds, sitting in the back with not much to do. Sure, you could get them PSPs or mini DVD players but that's probably an expense that you could do without.

A cheaper option to keep them amused would be to download two of the latest voice options for your TomTom satnav.

You may have never heard of Dora the Explorer or SpongeBob SquarePants but we can guarantee your kids will have done.

SpongeBob, who you probably have heard of, will belt out one liners such as: “Hey, I don’t have a license to drive. So is it illegal when I drive Mr. Krabs crazy?” and “Exit ahead. Hey, we’re cruisin’ in a car! I’ve only cruised in a boat before!” What a funny little chap he is eh?

“Working with Spot It Out and Nickelodeon enables TomTom to expand the range we can deliver to drivers so that drivers can personalise their devices with an array of fun personalities”, said Tom Murray, senior vice president of market development (we think you have to be called Tom to work for TomTom).

“The voices of Dora the Explorer and SpongeBob SquarePants arrive just in time for TomTom users to enjoy during their summer adventures - from camp carpools to vacations - and keep the whole family entertained along the way”.

The voices are available to download now and will cost £7.95 each. Pittance if it keeps the kids quiet.