Freedom to paint, however, wherever and whenever you like: Giotto Acrylic paints are safe and can be used on any medium! Ready-to-use acrylic-based paints with rich pigments designed especially for children, making them completely safe and ideal for any application. Formulated with a special resin that's easy to apply on various media including glass, plastic and wood. When dry, it bestows a glossy varnish effect on painted surfaces.