2pcs Educational Scientific Beginners Ornaments Compact Reusable

DIY sundial clock--in the absence of any electronic device to know the time, you can judge from the shadow of the sun,ancient sundial clock Solarium model--this is a relatively common timekeeping instrument in ancient china, which determines the time according to the angle of the sun,teaching aid Wooden scientific model--it is mainly based on the position of the shadow of the sun to specify the time or the number of at that time,diy sun clock Scientific sundial--a simple and practical teaching and experiment equipment in the sundial clock,home decor Scientific sundial model--it is a choice as a present for your at school if they do experiments in laboratory,equatorial sundial clock