Or HaChaim on Exodus 36:3/אור החיים על שמות ל״ו:ג׳

1 והם הביאו אליו עוד נדבה בבוקר בבוקר, and they kept bringing further donations to him morning after morning. This refers to the materials used in the Tabernacle such as fabrics which had been woven or spun out of blue wool, goats' hair, etc. All the items which could not be used in their original form were delivered in a condition that enabled them to be used forthwith. This is why it took several days for such donations to have been completed. Donations such as gold, silver, etc., were all delivered on the very first day.