I want to know if the adhesive that comes with the silhouettes is safe for my nursery.
Yes, the adhesive is perfectly safe. We chose to use an ecological product that is not harmful in any way. It is made from high grade methylcellulose (which is a "natural" chemical derived from wood) without any additives or solvents.
The manufacturer Auro from Germany is renowned for their ecological paints and adhesives. If you are planning to make your nursery as eco-friendly as possible, be sure to check out their products.