These Amaryllis are planted in a clay pot and are getting ready to bloom! Put these in a spot with bright, indirect light and water regularly, roughly once a week. Don't allow them to sit in water. It also helps to rotate the pots occasionally to ensure the flower stems grow straight. When they do start blooming the weight of the flowers could be too much for the stems so they may need to be staked.
Getting Amaryllis to rebloom next year:
If you'd like to try to keep your bulb for next year, you can follow a few easy steps. Once it is done flowering, cut the flower stems back to about 1", then water and fertilize through the spring and summer, it will have nice green foliage. Around mid-August stop watering and allow the foliage to die back and the soil to dry out completely. Once that happens take the bulb out and store it in a cool, dry, dark place for at least 8 weeks. Then you can take the bulb out and plant it in new potting soil, put it in a bright spot and start to water it sparingly until new growth appears, then start watering regularly. It should bloom in about 6-8 weeks.