Laboratory animals should be kept in facilities ensuring appropriate environmental conditions for a given species, including the necessary freedom of movement, food and water and care to ensure their health. No lesser of an important factor in improving animal welfare is through the use of various types of elements enriching the environment, which do not disturb proper behavioural attitudes and reduce stress factors. Such enrichment includes commercially available elements made of polycarbonate, cotton, aspen wood and cellulose and paper tubes from households of an economic origin. Commercially available enrichments have a high standard of manufacturing and guarantee safety, which, in the case of “home-made” cellulose tubing, is difficult to guarantee, particularly when they contain dyes, printing inks or adhesive residues. The aim of the study was to assess the content of heavy metals in home-made environmental enrichments. The comparative material was commercially available enrichments. Two methods of mineralisation of the tested material and ICP-OES analytical method were used to determine the content of heavy metals. Nutritional intake standards for rodents served us as critical parameters. The results of the analysis showed that both types of environmental enrichment (“home-made” and “commercial”) do not contain toxic heavy metals. The only impurities that were determined by the method used were iron and copper, whose content in the analysed material differed depending on the method of sample preparation. The content of copper and iron was much lower than the feeding standards for rodents.