Included with this model is a tiny Saab 96 pedal car. According to the leaflet, the Saab 96 was the main reason for developing the Saabo caravan in the first place, since the car was not strong enough to properly pull most of the existing caravans of the time, so Saab wanted to create a caravan for Saab-owners. The name Saabo is a contraction of Saab an 'Bo', which means 'home' or 'house' in swedish. If you look closely at the model plinth, you'll also notice the clever shaping of the Saabo-logo, with the 'o' having a tiny wheel and a 'drawbar' connecting it to the 'Saab'-part of the name.
The pedal cars are said to have been given as free gifts to Saabo customers with kids, so having it included here is no coincidence.