If you guys are looking to gain size on your arms and shoulders then I've got a killer shoulder and arm workout in store for you. (justinkavanaghfitness.com)
Window activities are also great for strengthening shoulder and arm muscles, developing gross motor skills as well as fine tuning fine motor skills. (besttoys4toddlers.com)
While all these poses are beneficial for shoulders and arms, listen to your body carefully before practicing any of these. (yogicwayoflife.com)