"An April Fool whistle can be made as shown in the illustration, and filled with flour, which will fly into the face of any one who tries to blow it. A B (Fig. 1) is a tin tube, stopped by two pieces of cork. One at the end has holes in it and a glass tube through it, as shown in Fig. 2. The other figures explain themselves.
[The Young Folks' Cyclopedia of Games and Sports