You can print in card stock or paper, laminate, cut in you want, and have students use expo markers to make them long lasting.
I've had my students use them as a guide to make their own. Some of them will sit there and count how many cubes they need to make the word, but that's not necessary. Then with an expo marker they can write the word again. Very simple and easy to use and all in SPANISH!
Here are the sight words I've included:
yo, la, en, y, un, es, por, al, su, soy, el, una, son, veo, tu, mi, este, gusta, fue, esta, del, los, las, se, va, de, no, tiene, con, tengo, otro, dice, ellos, vamos, les, muy, ese, usa, ir, que, me, estoy, eso, da, pero, era, ellas, dijo, esa, mira, donde, tambien, voy, sus, unos, mis