Featuring Six Trend-Inspired D.I.Y. Product Lines for Children   The slime trend of 2017 is here to stay. Horizon Group USA will continue to lead the arts and crafts industry with innovation as it expands its lines of D.I.Y., all-in-one slime-based kits.   “As early as 2014, we identified that the link between S.T.E.M. and mindfulness was …