I've sent some info to cupcake via PM earlier today but it probably makes more sense to do it on the forum, in case it's of use to others in future.
Looking through various records I think we have the following for the children of James and Lousia.
Children:Coleman Hugh (1873 - 1951; age 78); m. 1894 Annie Mira Mary Close (1872 - 1944; age 72)
Percy Charles (1875 - 1944; age 69); m. 1904 Gertrude Partridge (1868 - 1953; age 85)
Ellen Elizabeth (1877 - 1937; age 59); m. 1897 Walter Carter (1869 - 1962; age 93)
Mary Louise (1879 - 1960; age 81); m. 1911 Harry Wentworth Tice (1867 - 1950; age 82)
Mabel Topsy (1880 - 1962; age 81); m. 1907 Leopold Henry Day (1879 - 1938; age 59)
Michaelmas George (1881 - 1918; age 37)
Edith Isabella (1883 - 1888; age 4)
Joseph (1886 - 1970; age 83); m. 1925 Elsie Mary Harding (1900 - 1981; age 80)
Thomas Randolph (1889 - 1964; age 74); m. 1912 Dorothy Jane Goddard (1890 - 1973; age 82)
Decima Omega (1892 - 1979; age 87); m. 1916 George Harold Thompson (1893 - 1970; age 76)
GRO BMD references:1873 Q3 Birth - Coleman Hugh Kidman (mmn: Crouch); Biggleswade; 03b; 356
1894 Q3 Marriage - Coleman Hugh Kidman & Annie Mira M Close; Pancras; 01b; 20
1944 Q4 Death - Annie Mira Mary Kidman; age 72 (born c1872); Hastings; 02b; 4
1951 Q1 Death - Coleman Hugh Kidman; age 79 (born c1872); Northampton; 03b; 781
1877 Q2 Birth - Ellen Elizabeth Kidman (mmn: Crouch); Biggleswade; 03b; 385
1897 Q2 Marriage - Walter Carter & Ellen Elizabeth Kidman; Biggleswade; 03b; 797
1937 Q1 Death - Ellen Elizabeth Carter; age 59 (born c1878); Hitchin; 03a; 1414
1962 Q4 Death - Walter Carter; age 93 (born c1869); Biggleswade; 04a; 89
1867 Q4 Birth - Harry Wentworth Tice (mmn: Wentworth); Chertsey; 02a; 36; copy A
1879 Q2 Birth - Mary Louise Kidman (mmn: Crouch); Biggleswade; 03b; 367
1911 Q2 Marriage - Harry W Tice & Mary L Kidman; Biggleswade; 03b; 803
1950 Q3 Death - Harry Wentworth Tice; age 82 (born c1868); Middlesex South; 05f; 54
1960 Q1 Death - Mary L Tice; age 81 (born c1879); Middlesex South; 05f; 98
1879 Q4 Birth - Leopold Henry Day (mmn: Bonfield); Royston; 03a; 360
1880 Q3 Birth - Mabel Topsy Kidman (mmn: Crouch); Biggleswade; 03b; 352
1907 Q2 Marriage - Leopold Henry Day & Mabel Kidman; Huntingdon; 03b; 607
1939 Q1 Death - Leopold Henry Day; age 59 (born c1880); Lincoln; 07a; 611
1962 Q1 Death - Mabel Day; age 81 (born c1881); Lincoln; 03b; 394
1881 Q4 Birth - Michaelmas George Kidman (mmn: Crouch); Biggleswade; 03b; 344
1883 Q4 Birth - Edith Isabella Kidman (mmn: Crauch); Biggleswade; 03b; 351
1888 Q1 Death - Edith Isabella Kidman; age 4 (born c1884); Biggleswade; 03b; 247
1887 Q1 Birth - Joseph Kidman (mmn: Crouch); Biggleswade; 03b; 337
1925 Q3 Marriage - Joseph Kidman & Elsie M Harding; Linton; 03b; 1279
1970 Q3 Death - Joseph Kidman; born 31 Dec 1886; Maldon; 04a; 1758
1981 Q1 Death - Elsie Mary Kidman; born 09 Aug 1900; Chelmsford; 009; 2132
1889 Q1 Birth - Thomas Randolph Kidman (mmn: Crouch); Biggleswade; 03b; 348
1890 Q2 Birth - Dorothy Jane Goddard (mmn: William); Chippenham; 05a; 73
1912 Q3 Marriage - Thomas R Kidman & Dorothy J Goddard; Chippenham; 05a; 156
1964 Q1 Death - Thomas R Kidman; age 74 (born c1890); Hendon; 05e; 496
1973 Q1 Death - Dorothy Jane Kidman; born 17 May 1890; Chichester; 05h; 2210
1892 Q3 Birth - Decima Omega Kidman (mmn: Crouch); Biggleswade; 03b; 357
1916 Q4 Marriage - George H Thompson & Decima O Kidman; Biggleswade; 03b; 736
1970 Q2 Death - George Harold Thompson; born 16 Aug 1893; Bedford; 04a; 140
1979 Q3 Death - Decima Omega Thompson; born 03 Jul 1892; Bedford; 009; 0168
Probate/administrations:Coleman Hugh Kidman
of 79 Eastern-avenue Northampton
died 19 March 1951
Probate London 25 May
to Harold Alexander Luxford factory manager
Effects £780 13s
https://probatesearch.service.gov.uk/Calendar?surname=kidman&yearOfDeath=1951&page=2#calendarWalter Carter
of 8 The Avenue The Baulk Biggleswade Bedfordshire
died 16 Nov 1962
Probate London 14 Jan
to Ernest Carter Sidney Carter and Percy Carter farmers
Effects £2115 19s
https://probatesearch.service.gov.uk/Calendar?surname=carter&yearOfDeath=1963&page=18#calendarLeopold Henry Day
otherwise Leopold (the elder)
of the Bakery North Collingham Nottinghamshire
died 31 Dec 1938 at Bromhead Nursing Home Lincoln
Adminstration (with will) 29 April
to Mable Day widow and Leopold Henry Day baker
Effects £1912 17s 6d
https://probatesearch.service.gov.uk/Calendar?surname=day&yearOfDeath=1939&page=4#calendarMabel Day
of The Bakery North Collingham Nottinghamshire
widow died 24 Feb 1962 at 122 Boultham Park Road Lincoln
Administration (with will) Nottingham 3 May
to Leopold Henry Day baker
Effects £1199 6s
https://probatesearch.service.gov.uk/Calendar?surname=day&yearOfDeath=1962&page=10#calendarElsie Mary Kidman
of Longfield Fambridge Clo Maldon Essex
died 17 Feb 1981
Probate London 30 Mar
£2239
810005872T
https://probatesearch.service.gov.uk/Calendar?surname=Kidman&yearOfDeath=1981#calendarThomas Randolph Kidman
of 11 Crown Road Friern Barnet Middlesex
died 6 Jan 1964
Probate London 26 Mar
to Michael Randolph Kidman projector repair mechanic
£3501
https://probatesearch.service.gov.uk/Calendar?surname=Kidman&yearOfDeath=1964&page=3#calendar