The objective has been to pinpoint the risks that might exist when children are playing and staying in tents and tunnels. The emission of chemical substances was tested on 6 selected products. The assessment showed that during the first hours of use, an increased emission of formaldehyde occurred and that there therefore may be a risk to health due to formaldehyde emission. As for the other substances, the emitted quantities were relatively small and it is assessed that the health effects will be insignificant.