What will be the best toys/games a dad can get for her 8 month old daughter. Like my daughter loves to see train running on track. what are other such toys/games I can get for her?

Cup stackers and shape sorters will be good for her cognitive development! U may want to try getting Mega Blocks too from Toy R US to create trains or cars! most importantly u as a playmate will make the play process more meaningful and interesting!