The Lake Bluff Downtown Merchants plan a “Spring Clean” sidewalk sale on Friday, April 10 and Saturday, April 11 from 10 a.m. to 6 p.m. on both days. To coincide with the sale, the Lake Bluff History Museum has scheduled a “Trinkets and Treasures” sale from 9 a.m. to 4 p.m. on Friday and 9 a.m. to 3 p.m. on Saturday.